/* cover-style images */
img{display:block;width:100%;height:100%;object-fit:cover}

/* ===== PROLOGUE (cover) ===== */
			.cover {
				position: relative;
				min-height: 88vh;
				display: flex;
				align-items: center;
				justify-content: center;
				text-align: center;
				overflow: hidden;
			}
			.cover__bg {
				position: absolute;
				inset: 0;
				z-index: 1;
				background: linear-gradient(135deg, #2b3038, #0e0f12);
			}
			.cover__bg img {
				transform: scale(1.06);
				animation: kb 22s ease-out forwards;
				filter: grayscale(0.15) brightness(1.15);
			}
			@keyframes kb {
				to {
					transform: scale(1.15);
				}
			}
			.cover__scrim {
				position: absolute;
				inset: 0;
				z-index: 2;
				background: radial-gradient(
					ellipse at center,
					rgba(9, 10, 12, 0.18) 0%,
					rgba(9, 10, 12, 0.78) 100%
				);
			}
			.cover__in {
				position: relative;
				z-index: 3;
				padding: 150px var(--pad) 80px;
				max-width: 860px;
			}
			.cover .crumb {
				font-size: 11.5px;
				letter-spacing: 0.16em;
				color: rgba(255, 255, 255, 0.72);
				margin-bottom: 30px;
			}
			.cover .crumb a:hover {
				color: var(--terra);
			}
			.cover .roman {
				font-family: "Zen Old Mincho", serif;
				font-size: 13px;
				letter-spacing: 0.4em;
				color: var(--terra);
				margin-bottom: 22px;
			}
			.cover h1 {
				font-family: "Zen Old Mincho", serif;
				font-weight: 700;
				color: #fff;
				font-size: clamp(38px, 6vw, 72px);
				line-height: 1.4;
				letter-spacing: 0.08em;
				text-shadow: 0 2px 40px rgba(0, 0, 0, 0.5);
			}
			.cover .lead {
				margin-top: 26px;
				color: #dfe4e9;
				font-size: 15px;
				line-height: 2.2;
				text-shadow: 0 1px 16px rgba(0, 0, 0, 0.5);
			}
			.cover__toc {
				margin-top: 44px;
				display: flex;
				gap: 0;
				justify-content: center;
				border-top: 1px solid rgba(255, 255, 255, 0.25);
				border-bottom: 1px solid rgba(255, 255, 255, 0.25);
			}
			.cover__toc a {
				padding: 16px 26px;
				font-family: "Zen Old Mincho", serif;
				font-size: 13px;
				letter-spacing: 0.1em;
				color: #fff;
				display: flex;
				gap: 10px;
				align-items: baseline;
				transition: color 0.3s;
			}
			.cover__toc a b {
				font-size: 11px;
				color: var(--terra);
				font-weight: 400;
			}
			.cover__toc a:hover {
				color: var(--terra);
			}
			.cover__toc a + a {
				border-left: 1px solid rgba(255, 255, 255, 0.25);
			}
			@media (max-width: 640px) {
				.cover__toc {
					flex-direction: column;
				}
				.cover__toc a + a {
					border-left: none;
					border-top: 1px solid rgba(255, 255, 255, 0.25);
				}
			}

			/* ===== CHAPTER DIVIDER (full-bleed) ===== */
			.chdiv {
				position: relative;
				min-height: 74vh;
				display: flex;
				align-items: flex-end;
				overflow: hidden;
				scroll-margin-top: 70px;
			}
			.chdiv__bg {
				position: absolute;
				inset: 0;
				z-index: 1;
				background: linear-gradient(135deg, #2b3038, #0e0f12);
			}
			.chdiv__bg img {
				filter: grayscale(0.2) brightness(0.8);
				transform: scale(1.04);
			}
			.chdiv__scrim {
				position: absolute;
				inset: 0;
				z-index: 2;
				background: linear-gradient(
					180deg,
					rgba(9, 10, 12, 0.5) 0%,
					rgba(9, 10, 12, 0.2) 45%,
					rgba(9, 10, 12, 0.92) 100%
				);
			}
			.chdiv__num {
				position: absolute;
				right: clamp(10px, 4vw, 60px);
				top: 8vh;
				z-index: 3;
				font-family: "Zen Old Mincho", serif;
				font-weight: 900;
				font-size: clamp(120px, 24vw, 300px);
				line-height: 1;
				color: transparent;
				-webkit-text-stroke: 1px rgba(255, 255, 255, 0.28);
			}
			.chdiv__in {
				position: relative;
				z-index: 4;
				padding: 0 var(--pad) clamp(44px, 7vw, 72px);
				max-width: 900px;
			}
			.chdiv .ch {
				font-family: "Zen Old Mincho", serif;
				font-size: 13px;
				letter-spacing: 0.34em;
				color: var(--terra);
				margin-bottom: 18px;
				display: flex;
				align-items: center;
				gap: 16px;
			}
			.chdiv .ch::before {
				content: "";
				width: 44px;
				height: 1px;
				background: var(--terra);
			}
			.chdiv h2 {
				font-family: "Zen Old Mincho", serif;
				font-weight: 700;
				color: #fff;
				font-size: clamp(30px, 4.8vw, 54px);
				line-height: 1.45;
				letter-spacing: 0.05em;
				text-shadow: 0 2px 36px rgba(0, 0, 0, 0.5);
			}
			.chdiv .svcname {
				position: relative;
				z-index: 4;
				font-family: "Zen Old Mincho", serif;
				font-size: 12.5px;
				letter-spacing: 0.28em;
				color: rgba(255, 255, 255, 0.75);
				margin-top: 14px;
			}

			/* ===== CHAPTER BODY ===== */
			.chbody {
				background: var(--midnight);
				padding: clamp(56px, 9vw, 110px) var(--pad);
			}
			.chbody__in {
				max-width: 720px;
				margin: 0 auto;
			}
			.chbody p {
				font-size: 15.5px;
				color: #c7cdd2;
				line-height: 2.4;
			}
			.chbody p em {
				font-style: normal;
				color: #fff;
				border-bottom: 1px solid var(--terra);
				padding-bottom: 1px;
			}
			.chbody .drop::first-letter {
				font-family: "Zen Old Mincho", serif;
				font-size: 3.1em;
				float: left;
				line-height: 1;
				padding: 6px 12px 0 0;
				color: var(--terra);
			}

			/* ch1: feature list */
			.corelist {
				max-width: 860px;
				margin: clamp(30px, 4vw, 50px) auto 0;
			}
			.cl {
				display: grid;
				grid-template-columns: 150px 1fr;
				gap: 24px;
				padding: 26px 0;
				border-top: 1px solid var(--line);
				align-items: start;
			}
			.cl:last-child {
				border-bottom: 1px solid var(--line);
			}
			@media (max-width: 640px) {
				.cl {
					grid-template-columns: 1fr;
					gap: 8px;
				}
			}
			.cl .no {
				font-family: "Zen Old Mincho", serif;
				color: var(--terra);
				font-size: 14px;
				letter-spacing: 0.2em;
				padding-top: 4px;
			}
			.cl h3 {
				font-family: "Zen Old Mincho", serif;
				font-weight: 600;
				font-size: 20px;
				color: #fff;
				line-height: 1.6;
				margin-bottom: 6px;
			}
			.cl p {
				font-size: 13.5px;
				color: var(--muted);
				line-height: 2;
			}

			/* ch2: big word trio */
			.trio {
				max-width: 860px;
				margin: clamp(36px, 5vw, 60px) auto 0;
				display: flex;
				justify-content: center;
				align-items: baseline;
				gap: clamp(20px, 4vw, 52px);
				flex-wrap: wrap;
				text-align: center;
			}
			.trio .t {
				font-family: "Zen Old Mincho", serif;
				font-weight: 900;
				color: #fff;
				font-size: clamp(38px, 6.4vw, 74px);
				line-height: 1.2;
				letter-spacing: 0.06em;
			}
			.trio .t small {
				display: block;
				font-size: 12px;
				font-weight: 400;
				letter-spacing: 0.3em;
				color: var(--terra);
				margin-top: 10px;
			}
			.trio .dot {
				color: var(--terra);
				font-size: clamp(20px, 3vw, 34px);
			}
			@media (max-width: 520px) {
				.trio {
					flex-direction: column;
					gap: 26px;
				}
				.trio .dot {
					display: none;
				}
			}

			/* ch3: pull quote */
			.quote {
				max-width: 760px;
				margin: clamp(36px, 5vw, 60px) auto 0;
				text-align: center;
				padding: clamp(28px, 4vw, 44px) 0;
				border-top: 1px solid var(--line);
				border-bottom: 1px solid var(--line);
			}
			.quote p {
				font-family: "Zen Old Mincho", serif;
				font-weight: 600;
				color: #fff;
				font-size: clamp(22px, 3.4vw, 34px);
				line-height: 1.9;
				letter-spacing: 0.06em;
			}
			.quote p em {
				font-style: normal;
				color: var(--terra);
			}
			.quote small {
				display: block;
				margin-top: 14px;
				font-size: 12px;
				letter-spacing: 0.2em;
				color: var(--muted);
			}

			/* verdict: 三本柱の帰結 */
			.verdict {
				background: var(--paper);
				padding: clamp(64px, 10vw, 130px) var(--pad);
			}
			.verdict__in {
				max-width: 980px;
				margin: 0 auto;
			}
			.verdict .roman {
				font-family: "Zen Old Mincho", serif;
				font-size: 12.5px;
				letter-spacing: 0.34em;
				color: var(--terra);
				margin-bottom: 18px;
				display: block;
				text-align: center;
			}
			.verdict h2 {
				font-family: "Zen Old Mincho", serif;
				font-weight: 700;
				font-size: clamp(22px, 3.2vw, 32px);
				color: #fff;
				margin-bottom: clamp(28px, 4vw, 46px);
				text-align: center;
			}
			.vrow {
				display: grid;
				grid-template-columns: auto 1fr;
				gap: clamp(24px, 5vw, 60px);
				align-items: baseline;
				padding: clamp(28px, 4vw, 44px) 0;
				border-bottom: 1px solid var(--line);
			}
			.vrow:first-of-type {
				border-top: 1px solid var(--line);
			}
			@media (max-width: 640px) {
				.vrow {
					grid-template-columns: 1fr;
					gap: 10px;
				}
			}
			.vrow .word {
				font-family: "Zen Old Mincho", serif;
				font-weight: 900;
				color: #fff;
				font-size: clamp(38px, 6.6vw, 76px);
				line-height: 1.1;
				letter-spacing: 0.02em;
				white-space: nowrap;
			}
			.vrow .word em {
				font-style: normal;
				color: var(--terra);
				font-size: 0.26em;
				letter-spacing: 0.14em;
				margin-left: 14px;
				vertical-align: middle;
			}
			.vrow p {
				font-size: 14.5px;
				color: #c7cdd2;
				line-height: 2.15;
				max-width: 440px;
			}

			/* flow: quiet numbered list */
			.flow {
				background: var(--midnight);
				padding: clamp(60px, 9vw, 110px) var(--pad);
			}
			.flow__in {
				max-width: 720px;
				margin: 0 auto;
			}
			.flow .roman {
				font-family: "Zen Old Mincho", serif;
				font-size: 12.5px;
				letter-spacing: 0.34em;
				color: var(--terra);
				margin-bottom: 18px;
				display: block;
				text-align: center;
			}
			.flow h2 {
				font-family: "Zen Old Mincho", serif;
				font-weight: 700;
				font-size: clamp(22px, 3.2vw, 32px);
				color: #fff;
				margin-bottom: clamp(28px, 4vw, 46px);
				text-align: center;
			}
			.fl {
				display: grid;
				grid-template-columns: 80px 1fr;
				gap: 22px;
				padding: 20px 0;
				border-top: 1px solid var(--line);
				align-items: baseline;
			}
			.fl:last-of-type {
				border-bottom: 1px solid var(--line);
			}
			.fl .no {
				font-family: "Zen Old Mincho", serif;
				color: var(--terra);
				font-size: 13px;
				letter-spacing: 0.2em;
			}
			.fl h3 {
				font-family: "Zen Old Mincho", serif;
				font-weight: 600;
				font-size: 17px;
				color: #fff;
				line-height: 1.6;
			}

			/* epilogue: quiet FAQ */
			.faq {
				background: var(--midnight);
				padding: clamp(60px, 9vw, 110px) var(--pad);
				border-top: 1px solid var(--line);
			}
			.faq__in {
				max-width: 820px;
				margin: 0 auto;
			}
			.faq .roman {
				font-family: "Zen Old Mincho", serif;
				font-size: 12.5px;
				letter-spacing: 0.34em;
				color: var(--terra);
				margin-bottom: 18px;
				display: block;
				text-align: center;
			}
			.faq h2 {
				font-family: "Zen Old Mincho", serif;
				font-weight: 700;
				font-size: clamp(22px, 3.2vw, 32px);
				color: #fff;
				margin-bottom: clamp(28px, 4vw, 46px);
				text-align: center;
			}
			.qa {
				border-top: 1px solid var(--line);
			}
			.qa:last-child {
				border-bottom: 1px solid var(--line);
			}
			.qa summary {
				list-style: none;
				cursor: pointer;
				padding: 24px 44px 24px 0;
				position: relative;
				font-family: "Zen Old Mincho", serif;
				font-size: 16px;
				color: #fff;
				line-height: 1.7;
			}
			.qa summary::-webkit-details-marker {
				display: none;
			}
			.qa summary::after {
				content: "+";
				position: absolute;
				right: 4px;
				top: 22px;
				color: var(--terra);
				font-size: 22px;
				transition: transform 0.35s var(--ease);
			}
			.qa[open] summary::after {
				transform: rotate(45deg);
			}
			.qa .ans {
				padding: 0 0 28px;
				font-size: 14.5px;
				color: #b9c0c7;
				line-height: 2.1;
			}

			

			@media (prefers-reduced-motion: reduce) {

				.cover__bg img {
					transform: scale(1.06);
				}
			}